#include<stdio.h>
int main()
{
	int a = 5;
	int b = 7;
	/*a = a + b;
	b = a - b;
	a = a - b;*/
	a = a ^ b;
	b = a ^ b;
	a = a ^ b;
	printf("%d %d", a, b);
	return 0;
}